What made the cities of Mohenjo Daro and Harappa advanced for their time?

Mohenjo-daro is an archaeological site in the province of Sindh, Pakistan. Built around 2500 BCE, it was one of the largest settlements of the ancient Indus Valley Civilisation, and one of the world's earliest major cities, contemporaneous with the civilizations of ancient Egypt, Mesopotamia, Minoan Crete, and Norte Chico. Mohenjo-daro was abandoned in the 19th century BCE as the Indus Valley Civilization declined, and the site was not rediscovered until the 1920s. Significant excavation has since been conducted at the site of the city, which was designated a UNESCO World Heritage Site in 1980. The site is currently threatened by erosion and improper restoration.

Explanation:

good luck

During 15 and 16 th century Spain as a beautiful country. they traded goods across the Atlantic ocean.

Explanation:

Spanish empire was very big with a strong naval force. It fought against Ottoman empire, France and in America, Spain wanted its colonies to be independent. Due to the rise of the Portuguese and European powers, Spain lost most of its territories.

Roman Catholic churches were famous in Spain which were brought to America too due to the colonization. Together with Portuguese, Spain entered many international trades. Spanish empire began from 16th century after the arrival of Christopher Columbus after which famous Aztec, Inca and Mayan empire can be seen even today.